Housing and lithium secondary battery using same
A lithium secondary battery and shell technology, applied in the field of lithium secondary batteries, can solve problems such as accidental fire or explosion of lithium secondary batteries, short circuit of electrode plates, etc.
Inactive Publication Date: 2009-08-19
SAMSUNG SDI CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Then, irregular pressure is locally applied to the electrode assembly in the case, so that a short circuit may occur between the electrode plates of the electrode assembly, causing the lithium secondary battery to catch fire or explode unexpectedly
Method used
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Embodiment Construction
[0044] see you now figure 1 , figure 1 It is an exploded perspective view of a lithium secondary battery. By accommodating the electrode assembly 112 together with the electrolyte in the case 110 and then sealing the upper opening 110a of the case 110 with the cap assembly 120, the following can be obtained: figure 1 In the shown lithium secondary battery, the electrode assembly includes a positive electrode plate 113 , a negative electrode plate 115 and a separator 114 . Usually, the housing 110 is made of aluminum or aluminum alloy by deep drawing method. In addition, the lower surface 110b of the housing 110 is substantially flat.
[0045] The electrode assembly 112 may be formed by winding the positive electrode plate 113 and the negative electrode plate 115 together while interposing the separator 114 therebetween. The positive electrode sheet 116 is combined with the positive electrode plate 113 , and the end of the positive electrode sheet 116 protrudes upward from ...
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Abstract
The invention discloses a casing for a lithium secondary battery and a lithium secondary battery using the casing, wherein guide grooves are formed in the bottom wall and the side wall of the casing of the lithium secondary battery so that the lithium secondary battery is subjected to When squeezed in a direction perpendicular to the longitudinal axis, the casing is bent symmetrically relative to its longitudinal axis, thereby preventing short circuits between electrode plates of the electrode assembly in the casing and improving the safety of the lithium secondary battery. In addition, an embossed portion is formed on the bottom wall of the case of the lithium secondary battery and protrudes toward the inner portion of the case so that the bottom wall of the case faces outward when the lithium secondary battery is pressed in a direction perpendicular to the longitudinal axis. By bending, the safety of the lithium secondary battery can be improved.
Description
technical field [0001] The present invention relates to a casing and a lithium secondary battery using the casing. More specifically, the case of the present invention and the lithium secondary battery using the case are characterized in that guide grooves are formed on the bottom wall and the side wall of the lithium secondary battery case, so that the lithium secondary battery When pressed in a direction perpendicular to the longitudinal axis, the casing bends symmetrically around its longitudinal axis, thereby preventing short circuits between the electrode plates, thereby improving the safety of the lithium secondary battery. [0002] In addition, the present invention relates to a case and a lithium secondary battery using the case, wherein embossed portions are formed on the bottom wall of the lithium secondary battery case and protrude toward the inside of the case so that the lithium secondary battery is subjected to When squeezed along a direction perpendicular to th...
Claims
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IPC IPC(8): H01M2/02H01M10/40H01M10/36H01M2/34H01M10/052
CPCY02E60/122Y02E60/10H01M10/052H01M50/103H01M50/578
Inventor 李尚佑宋民镐金光守
Owner SAMSUNG SDI CO LTD